Can hep c live in the liver, macrophages or lymphocytes after SVR?
Canuck said
Jul 4, 2016
Love a good copyright infringement brawl (and plagiarization)! My favs!
I liked the one Linux coined, "C-Begone", hee-heee, AND mine, borrowed from a brylcream commercial " a litle dab will do ya" ("dab" that's what they should call these short courses of sof/vel/vox)! Sheesh, what should a one day/one dose course of RG101 be called?!
This is all Pablo and Skewed's fault!, THEY started it! C.
Sydhanrahan said
Jul 4, 2016
I didn't want to "read" that online Wiley stuff, but didn't have the common sense to stay away. I used those quotation marks because when you don't understand more than 30% of words in any given sentence, it's probably not what youre doing. But I did get the bit about the virus still being detectable after nine years in most guinea pigs. That made me sad until I read Pablo's take on it. And yes, once a zap was added I knew Dave's tin foil hat, Jimmy's I'll take that thanks and look here's what it goes with stuff and Tig's wry commentary would all come rolling in.
Predictable = funny = safe.
What would we do without you all?
Syd
Pablito said
Jul 3, 2016
Maybe we should apply for a trade mark?
-- Edited by Pablito on Sunday 3rd of July 2016 07:07:10 PM
JimmyK said
Jul 3, 2016
Good thing you live by the sea.
Tig said
Jul 3, 2016
ZAP THE MAGIC DRAGON, LIVES INSIDE OF ME...... We need a musical rendition of this, you know the theme I'm thinking about!
Linuxter said
Jul 3, 2016
LOL, I knew that with ZAP in the picture it wouldn't take long for Jimmy to chime in.
Zap would be a great name for it though. Ads would say "Zap the Dragon" ... as a big bolt of lightning strikes the beast.
... don't know about you but I'm wearin' my tinfoil hat if I take it.
D
Loopy Lisa said
Jun 30, 2016
I remember reading a few years back that there were pockets in liver damage where particles could hide out and slowly reproduce. But I also read the particles were not able to reproduce in some people and others they were - a bit like "brexit" the opinions were divided.
Now they are calling it a cure, because we are stopping the reproduction of the virus, so I actually believe in most cases it will be a complete cure. The human body is full of viruses like Chicken pox. The immune system controls and contains it, but in a rare few they develop Shingles. Why only some, nobody knows. It can be a very weakened immune system and some particles reactivate. Either way, most doctors now consider us NOT infectious although they wouldn't take a blood donation from us.
Since we are blocking, rather than destroying, it can't reproduce so its bye bye from them :D
JimmyK said
Jun 30, 2016
Tig56 wrote:
That ZAP stuff, that's the ticket! At least we have a name for it when it's developed...
In 2020 Jed goes to his hepatologist, and he is prescribed a 3-day course of sof-vel-vox-dac-zap. And he's cured.
LOL no doubt. That was good!
JimmyK
-- Edited by JimmyK on Friday 1st of July 2016 07:40:14 AM
Tig said
Jun 30, 2016
That ZAP stuff, that's the ticket! At least we have a name for it when it's developed...
Pablito said
Jun 30, 2016
Jimmy -
In 2020 Jed goes to his hepatologist, and he is prescribed a 3-day course of sof-vel-vox-dac-zap. And he's cured.
Tig said
Jun 30, 2016
Based on the article:
"This continuous presence of HCV RNA could explain the phenomenon of relatively common persistence of humoral and cellular immunity for many years after supposed viral clearance and could present a potential risk for transmission or infection reactivation."
It would then be dependent on how long active virus can remain hidden. Does SVR ever mean complete absence of HCV RNA? If we're to believe the research, then no, it doesn't. I do think that the longer an individual maintains SVR, the likelihood of relapse (reactivation) remains low (<.5%). At least that's the anecdotal evidence I keep reading about. We haven't witnessed the number of successes we are now. So I think in the decade or two to come, we'll have the opportunity to collect the data that will provide the answer. By then, treatment will have improved so much, this will probably be a mute point. I don't think we're far off now.
In the meantime, like Pablo, I'm not going to worry about it
JimmyK said
Jun 30, 2016
Greetings,
I do greatly enjoy such banter so as to keep the Grey Matter exercised.
With that then, I would like to see some thoughts on this scenario.
A person named Jed comes into contact with HCV in 1960. He does not know that. Years later, in the year 2000 he attempts to donate blood and is rejected because that have found the HCV AB.
He goes in for further tests, still early Y2K. He comes back UND and his Doctor explains that roughly 25% of people who come into contact with HCV fight it off with their own immune system.
Fast forward to the year 2020, Jed begins to show his age and it is noted that his immune system is compromised.
Can the 1960 contact now lead to a detectable HCV RNA?
Thinking caps required.
JimmyK
Pablito said
Jun 30, 2016
Interesting read indeed.
I must profess I find the whole topic confusing despite having read widely around the issues and having had it explained to me by doctors.
Why do a small percentage of people relapse after treatment when nearly everybody becomes UND at some point during DAA treatment?
The most cogent theory is that small amounts of HCV persist below the cut-point and that UND is not no viral RNA present but, moreover, a small amount of RNA may still exist below the cut-off. But then, confusingly, we get the scenario wherein a small percentage of people who are not UND at the end of treatment go on the achieve SVR. The thinking being that the remaining RNA are mutations without the ability to replicate properly and die off over time. But then we also know that that relapses are caused by resistance associated variations. So it seems that some mutations can replicate and others not.
Then you have the issue that only 65% of people improve their fibrosis score after achieving SVR with the remaining 35% being split fairly evenly between no improvement and a worsening of fibrosis. Surely one would expect nearly everyone to improve after SVR? Is it the case that, as per the linked paper below, that some viral RNA persists in some people's livers and therefore they don't improve despite their plasma being UND?
My brain begins to hurt when I think about these things! I think the bottom line is that the science isn't fully understood around this yet. So I am going to keep things simple:
-95% of people achieve SVR with DAAs;
-for the 5% of so who don't achieve SVR then a second, or even third, round of treatment with a different combo of DAAs for a longer period will work;
- the majority majority of people who achieve SVR will improve in terms of fibrosis;
- I'm going to take charge of the things that I can to keep my liver in good nick, e.g. not drinking alcohol;
- I will leave the speculation around what UND really means and whether the virus persists in a low grade form to the scientists, and not worry myself unduly about things I have no control over; for I know my own mind and I can work myself into a tizzy about such matters.
Amen.
Pablo
-- Edited by Pablito on Thursday 30th of June 2016 11:24:21 AM
Tig said
Jun 30, 2016
My thought is all treatment drugs block the virus' ability to replicate. When the viral load is low enough or undetected and kept there long enough, to assure adequate tissue perfusion, the body's immune system takes over the job. If there are viable viral particles (capable of replication) anywhere, and the immune system experiences a failure or crisis, there is a possibility of relapse. Post mortem studies on people that had experienced a SVR, have found viral evidence capable of reproduction. The immune system function is key in maintaining SVR.
Canuck said
Jun 30, 2016
Skewed,
Interesting (from 2005), but still .... good topic. Would have to search to see what else is "out there" on this topic (with the new daa's) and not just this one (from the old interferon days as you noted). Found persisting, 9 years! - interesting.
Mallani made mention of this (being in lymphocytes) and kind of on the side, another further conversation ensued about any possibility of fluctuating VL's coinciding/corresponding with with lymphocytes numbers. (See - "General Discussion - RE: Lymphocytes? (like Mallani said)!?".
C.
robertsamx said
Jun 29, 2016
I wonder if the results are the same For all those who did sof along with the peg-RIBA
also interesting that SVR blood has the potential to infect others with blood to blood contact?
skewedButNotBroken said
Jun 29, 2016
I ran across a white paper that answers this question with the older treatment (interferon and ribavirin). Here is the link to the paper: http://onlinelibrary.wiley.com/doi/10.1002/hep.20518/pdf
However, If anyone knows of a similar study done on SVR patients with the new DAA's, I would love to hear from you.
Love a good copyright infringement brawl (and plagiarization)! My favs!
I liked the one Linux coined, "C-Begone", hee-heee, AND mine, borrowed from a brylcream commercial " a litle dab will do ya" ("dab" that's what they should call these short courses of sof/vel/vox)! Sheesh, what should a one day/one dose course of RG101 be called?!
This is all Pablo and Skewed's fault!, THEY started it!
C.
I didn't want to "read" that online Wiley stuff, but didn't have the common sense to stay away. I used those quotation marks because when you don't understand more than 30% of words in any given sentence, it's probably not what youre doing. But I did get the bit about the virus still being detectable after nine years in most guinea pigs. That made me sad until I read Pablo's take on it. And yes, once a zap was added I knew Dave's tin foil hat, Jimmy's I'll take that thanks and look here's what it goes with stuff and Tig's wry commentary would all come rolling in.
Predictable = funny = safe.
What would we do without you all?
Syd
Maybe we should apply for a trade mark?
-- Edited by Pablito on Sunday 3rd of July 2016 07:07:10 PM
Good thing you live by the sea.
ZAP THE MAGIC DRAGON, LIVES INSIDE OF ME...... We need a musical rendition of this, you know the theme I'm thinking about!
LOL, I knew that with ZAP in the picture it wouldn't take long for Jimmy to chime in.
Zap would be a great name for it though. Ads would say "Zap the Dragon" ... as a big bolt of lightning strikes the beast.
... don't know about you but I'm wearin' my tinfoil hat if I take it.
D
I remember reading a few years back that there were pockets in liver damage where particles could hide out and slowly reproduce. But I also read the particles were not able to reproduce in some people and others they were - a bit like "brexit" the opinions were divided.
Now they are calling it a cure, because we are stopping the reproduction of the virus, so I actually believe in most cases it will be a complete cure. The human body is full of viruses like Chicken pox. The immune system controls and contains it, but in a rare few they develop Shingles. Why only some, nobody knows. It can be a very weakened immune system and some particles reactivate. Either way, most doctors now consider us NOT infectious although they wouldn't take a blood donation from us.
Since we are blocking, rather than destroying, it can't reproduce so its bye bye from them :D
Copyright Infringement!
Zap! has been around since 1968.
LOL no doubt. That was good!
JimmyK
-- Edited by JimmyK on Friday 1st of July 2016 07:40:14 AM
That ZAP stuff, that's the ticket! At least we have a name for it when it's developed...
Jimmy -
In 2020 Jed goes to his hepatologist, and he is prescribed a 3-day course of sof-vel-vox-dac-zap. And he's cured.
Based on the article:
"This continuous presence of HCV RNA could explain the phenomenon of relatively common persistence of humoral and cellular immunity for many years after supposed viral clearance and could present a potential risk for transmission or infection reactivation."
It would then be dependent on how long active virus can remain hidden. Does SVR ever mean complete absence of HCV RNA? If we're to believe the research, then no, it doesn't. I do think that the longer an individual maintains SVR, the likelihood of relapse (reactivation) remains low (<.5%). At least that's the anecdotal evidence I keep reading about. We haven't witnessed the number of successes we are now. So I think in the decade or two to come, we'll have the opportunity to collect the data that will provide the answer. By then, treatment will have improved so much, this will probably be a mute point. I don't think we're far off now.
In the meantime, like Pablo, I'm not going to worry about it
Greetings,
I do greatly enjoy such banter so as to keep the Grey Matter exercised.
With that then, I would like to see some thoughts on this scenario.
A person named Jed comes into contact with HCV in 1960. He does not know that. Years later, in the year 2000 he attempts to donate blood and is rejected because that have found the HCV AB.
He goes in for further tests, still early Y2K. He comes back UND and his Doctor explains that roughly 25% of people who come into contact with HCV fight it off with their own immune system.
Fast forward to the year 2020, Jed begins to show his age and it is noted that his immune system is compromised.
Can the 1960 contact now lead to a detectable HCV RNA?
Thinking caps required.
JimmyK
Interesting read indeed.
I must profess I find the whole topic confusing despite having read widely around the issues and having had it explained to me by doctors.
Why do a small percentage of people relapse after treatment when nearly everybody becomes UND at some point during DAA treatment?
The most cogent theory is that small amounts of HCV persist below the cut-point and that UND is not no viral RNA present but, moreover, a small amount of RNA may still exist below the cut-off. But then, confusingly, we get the scenario wherein a small percentage of people who are not UND at the end of treatment go on the achieve SVR. The thinking being that the remaining RNA are mutations without the ability to replicate properly and die off over time. But then we also know that that relapses are caused by resistance associated variations. So it seems that some mutations can replicate and others not.
Then you have the issue that only 65% of people improve their fibrosis score after achieving SVR with the remaining 35% being split fairly evenly between no improvement and a worsening of fibrosis. Surely one would expect nearly everyone to improve after SVR? Is it the case that, as per the linked paper below, that some viral RNA persists in some people's livers and therefore they don't improve despite their plasma being UND?
My brain begins to hurt when I think about these things! I think the bottom line is that the science isn't fully understood around this yet. So I am going to keep things simple:
-95% of people achieve SVR with DAAs;
-for the 5% of so who don't achieve SVR then a second, or even third, round of treatment with a different combo of DAAs for a longer period will work;
- the majority majority of people who achieve SVR will improve in terms of fibrosis;
- I'm going to take charge of the things that I can to keep my liver in good nick, e.g. not drinking alcohol;
- I will leave the speculation around what UND really means and whether the virus persists in a low grade form to the scientists, and not worry myself unduly about things I have no control over; for I know my own mind and I can work myself into a tizzy about such matters.
Amen.
Pablo
-- Edited by Pablito on Thursday 30th of June 2016 11:24:21 AM
My thought is all treatment drugs block the virus' ability to replicate. When the viral load is low enough or undetected and kept there long enough, to assure adequate tissue perfusion, the body's immune system takes over the job. If there are viable viral particles (capable of replication) anywhere, and the immune system experiences a failure or crisis, there is a possibility of relapse. Post mortem studies on people that had experienced a SVR, have found viral evidence capable of reproduction. The immune system function is key in maintaining SVR.
Skewed,
Interesting (from 2005), but still .... good topic. Would have to search to see what else is "out there" on this topic (with the new daa's) and not just this one (from the old interferon days as you noted). Found persisting, 9 years! - interesting.
Mallani made mention of this (being in lymphocytes) and kind of on the side, another further conversation ensued about any possibility of fluctuating VL's coinciding/corresponding with with lymphocytes numbers. (See - "General Discussion - RE: Lymphocytes? (like Mallani said)!?".
I wonder if the results are the same For all those who did sof along with the peg-RIBA
also interesting that SVR blood has the potential to infect others with blood to blood contact?
I ran across a white paper that answers this question with the older treatment (interferon and ribavirin). Here is the link to the paper: http://onlinelibrary.wiley.com/doi/10.1002/hep.20518/pdf
However, If anyone knows of a similar study done on SVR patients with the new DAA's, I would love to hear from you.
Cheers,
Skewed